TY - JOUR
ID - 10.1016/S1001-0742(11)61008-5
TI - Simulated-sunlight-activated photocatalysis of Methylene Blue using cerium-doped SiO2/TiO2 nanostructured fibers
AU - Yu Liu
AU - Hongbing Yu
AU - Zhenning Lv
AU - Sihui Zhan
AU - Jiangyao Yang
AU - Xinhong Peng
AU - Yixuan Ren and Xiaoyan Wu
VL - 24
IS - 10
PB -
SP - 1867
EP - 1875
PY -
JF - Journal of Environmental Sciences
JA - J. Environ. Sci.
UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2012241019&flag=1
KW - photocatalysis;SiO2/TiO2;cerium;nanostructured fibers;Methylene Blue
KW - photocatalysis;SiO2/TiO2;cerium;nanostructured fibers;Methylene Blue
AB - Cerium-doped SiO2/TiO2 nanostructured fibers were fabricated by electrospinning technology. The prepared fibers were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Using the fibers as catalysts, photocatalytic degradation of Methylene Blue (MB) aqueous solution was carried out under simulated sunlight. The 0.2% Ce doping proved to be the optimal concentration for the doping of TiO2/SiO2, compared to other Ce-doped molar concentrations. The 0.2% Ce-doped SiO2/TiO2 fibers exhibited higher photocatalytic activity than industrial Degussa P25 and the samples doped with only Ce or SiO2. The reasons for improving the photocatalytic activity were also discussed. Several operational parameters were studied, which showed that the photocatalytic efficiency of MB was influenced by parameters such as the initial dye concentration, the initial pH, inorganic anions, and so on. In addition, the influences of an electron acceptor and a radical scavenger suggested that OH was the dominant photooxidant during the photocatalytic process. The reuse evaluation of the fibers indicated that their photocatalytic activity had good stability.
ER -